Finally, it's hard to make an AGI if the rest of humanity thinks you're a supervillain, and anyone making an AGI based on a value system other than CEV most certainly is, so you're better off being the sort of researcher who would incorporate all humanity's values than the sort of researcher who wouldn't.

If you're openly making a fooming AGI, and if people think you have a realistic chance of success and treat you seriously, then I'm very sure that all major world governments, armies, etc. (including your own) as well as many corporations and individuals will treat you as a supervillain - and it won't matter in the least what your goals might be, CEV or no.